added NAS configuration file; updated MediaViewer to support thumbnail carousel; improved error handling in NASAPI and NASAUTH; refactored various comments for clarity

src/screens/SearchScreen.js

@@ -92,7 +92,7 @@ const SearchScreen = ({ route }) => {
         </>
       )}
 
-      <MediaViewer visible={viewerVisible} media={selectedMedia} onClose={() => setViewerVisible(false)} />
+      <MediaViewer visible={viewerVisible} media={selectedMedia} allMedia={results} onClose={() => setViewerVisible(false)} />
     </View>
   );
 };